41 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHfirst break down.
Reported or suspected cause
water pump blowing a seal
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
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Reported cause
More than likely with a sound it was the water pump blowing a seal.
Leading evidence: 'water pump blowing a seal' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'water pump blowing a seal' (1 discussions; 1 report identifying it and 0 suggest it). No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
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Reported cause
Hey now, you guys said it was the WP impeller explosion.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
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Suspected cause · Original poster
I suspect a bad water pump, because before I shut her off it made a funky sound.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
41 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
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Generation: 20261027T084359Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I dumped about a gallon of coolant from my Boxster (also an M96) between laps at an autocross - the engine was VERY hot, and I was waiting in pregrid for my next turn.
The issue turned out to be a failed coolant tank cap...I hope your diagnosis is equally benign.
You may want to read Jakes info about the impeller explosions and what happens next.
And sorry,,, CEF = catastrophic engine failure
MOF = mode of failure
They are both acronyms unique to the M96 NA.
I just did some reading. From my understanding if the water pump impellers were to break they would be logged into the coolant passages and cause hot spots which in return cracks the head or makes your head gasket fail? If that's the case to remove the plastic impellers does the engine need to be taken apart?
Good job on reading JR's info.
Keep reading, it gest even better. He goes so far as to piece the old impeller together like a jigsaw puzzle.
Hey now, you guys said it was the WP impeller explosion. I said "IF".
911661 or any of the newer guys, if you wanna know KK in a
nut
shell, look here at one of his more famous threads...
Paul, I think you may have covered more miles in you picking up your car than what KK has done with his entire length of ownership.
https://rennlist.com/forums/996-foru...road-trip.html
You know you are Krazy when the Moderator of the 996 board offers you
this
advice:
Post #7: Just sell your car. A car that causes you this much stress is not worth owning. Marc Gelefsky/Super Moderator
Hopefully all pieces will be accounted for during the through flushing of old coolant in preparation for new Porsche coolant. If they are lodged in the heads, it's more difficult to retrive. The 99-01 models crack heads easily.
If (big if) the impeller did come apart and there's nothing but speculation on this, but if the thing did come apart rigging up some pump that pumps water backwards through the engine (and if necessary the radiators through not at the same time as the engine) would flush the pieces out.
I just had the water pump go on my car a few months ago. When I pulled the pump, the impeller was in pieces, and they were all laying right there in the cavity where the pump is installed, once I pulled the pump, and the thermostat, I had all the pieces. I was able to fit all the pieces back together on the bad pump to even ensure that I had all the pieces. I am no expert, but feeling around in there, unless the impeller had completely smashed up in to really tiny pieces there is really no where for them to go, as the passages arent that big. I posted pictures of mine on the 40th AE thread.
